Merge branch 'issue/39-fix-search' of mhu/gds-render into dev

* Set freed pointer to NULL in dispose function because dispose cna be run multiple times. This fixes the case of freeing an already freed pointer.

doxygen/compilation.dox

@@ -30,7 +30,7 @@ Development is done with the following library versions:
 
 | Cairographics | GLib2      | GTK3      |
 | ------------- | ---------- | --------- |
-| 1.17.3        | 2.60.6-1   | 3.24.10-1 |
+| 1.17.2        | 2.64.2     | 3.24.18   |
 
 @section comp-instr Compilation Instructions
 @subsection linux-build General Linux Build Instruction
@@ -47,7 +47,7 @@ Once cmake has finished, type
  make
 @endcode
 to build the program and 
-
+ 
 @code
  make documentation
 @endcode
@@ -59,7 +59,7 @@ The subfolder 'AUR' contains a PKGBUILD file to build an Archlinux/Pacman packag
 
 @subsection comp-warnings Compiler Warnings
 
-The compiler will throw the following warnings. Compiled with GCC 8.2.1.
+The compiler will throw the following warnings. Compiled with GCC 9.3.0.
 
 | Warning | Assessment |
 | ------- | ---------- |

gds-render-gui.c

@@ -187,7 +187,8 @@ static gboolean cell_store_filter_visible_func(GtkTreeModel *model, GtkTreeIter
 
 	gtk_tree_model_get(model, iter, CELL_SEL_CELL, &cell, CELL_SEL_LIBRARY, &lib, -1);
 
-	if (lib) {
+    /* Show always, if this is a pure lib entry */
+    if (lib && !cell) {
 		result = TRUE;
 		goto exit_filter;
 	}

geometric/vector-operations.c

@@ -65,7 +65,7 @@ void vector_2d_rotate(struct vector_2d *vec, double angle)
 	sin_val = sin(angle);
 	cos_val = cos(angle);
 
-	vector_2d_copy(&temp, vec);
+	(void)vector_2d_copy(&temp, vec);
 
 	/* Apply rotation matrix */
 	vec->x = (cos_val * temp.x) - (sin_val * temp.y);

include/gds-render/geometric/cell-geometrics.h

@@ -35,10 +35,17 @@
 #include <gds-render/gds-utils/gds-types.h>
 
 /**
- * @brief calculate_cell_bounding_box Calculate bounding box of gds cell
+ * @brief Calculate bounding box of a gds cell.
- * @param box Resulting boundig box. Will be uüdated and not overwritten
+ *
+ * This function updates a given bounding box with the dimensions of a
+ * gds_cell. Please note that the handling of path miter points is not complete yet.
+ * If a path object is the outmost object of your cell at any edge,
+ * the resulting bounding box might be the wrong size. The devistion from the real size
+ * is guaranteed to be within the width of the path object.
+ *
+ * @param box Resulting boundig box. Will be updated and not overwritten
  * @param cell Toplevel cell
- * @warning Path handling not yet implemented correctly.
+ * @warning Handling of Path graphic objects not yet implemented correctly.
  */
 void calculate_cell_bounding_box(union bounding_box *box, struct gds_cell *cell);
 

layer/color-palette.c

@@ -238,6 +238,7 @@ static void color_palette_dispose(GObject *gobj)
 	if (palette->color_array) {
 		palette->color_array_length = 0;
 		free(palette->color_array);
+		palette->color_array = NULL;
 	}
 
 	/* Chain up to parent class */